Question

in water purification, alum is added during which Process? ​

Answer 1

Aluminium Sulfate, Shortly known as Alum, when added to raw water reacts with the bicarbonate alkalinities present in water and forms a gelatinous precipitate. This floc attracts other fine particles and suspended material in raw water, and settles down at the bottom of the container.

Answer 2

Answer:

This process is known as coagultion